UK Wolf Conservation Trust Pure Arctic wolves ?

I know that there have been comments that recent UK imports of 'Arctic' wolves from the Continent are not pure specimens .

The 3 wolves at the Wolf Conservation Trust were imported from Canada in 2011 where they were born and hand-raised at Parc Safari . Would these be pure Arctic wolves ? There are pictures of the wolves on their web-site .

The Trust which is near Reading is currently open to visitors every Wednesday .